Question

True or false cutting a log of wood unto pieces is a chemical change ______​

Answer 1

Answer:

Cutting a log of wood into pieces is a physical change. Formation of manure from leaves is a chemical change. Iron and rust are different substances.

Answer 2

Answer:

Burning of wood is a chemical change because wood on burning converted to new substances like ash (carbon), carbon dioxide gas, water vapour, heat and light. The change is irreversible. While cutting of wood in smaller pieces is a physical change because the original composition of wood does not change.